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Finding the Fourth Proportional to 643,695.66, 888,209.34 and 385,512.11

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Solution

The fourth proportional to 643,695.66, 888,209.34 and 385,512.11 is: 531,952.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,695.66 : 888,209.34 = 385,512.11 : x
  2. Step 2: Convert to fraction form
    643,695.66/888,209.34 = 385,512.11/x
  3. Step 3: Cross multiply
    643,695.66x = 888,209.34 × 385,512.11
  4. Step 4: Simplify right side
    643,695.66x = 342,415,452,344.06
  5. Step 5: Solve for x
    x = 342,415,452,344.06/643,695.66
  6. Step 6: Final answer
    x = 531,952.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.